Mouthpiece for pneumatic teat-cups.



No. 832,374. v PATENTED OGT. 2, 1906. A. GILLIBS.

f MOUTHPIBCE FOR PNEUMATIC TEAT CUPS.

APPLICATION FILED MAR. 22, 1.906. "1

' @Mwff www @dem UNITED -sTATEs PATENT oEEroE.

,ALEXANDER GILLIES. OF GEELONG, VICTORIA, AUSTRALIA. MOUTHPIECE FOR PNEUMATIC -TEAT-VOUPS Specication of Letters Patent.

Patented Oct. 2, luu.

proved in practlce that the pressure on thelteat is inclined to close the milk-passage therein, and so decrease the efficiency of the machine.

The object of my invention is to overcome this defect and at the same time provide a more durable mouthpiece. Accordingly the mouthpiece is formed ofsubstantially rigid substance, such as metal, having a hollow chamber with openings on the under side in communication with the suction in the cup and openings through its inner periphery. Themouthpiece is detachable and is secured to the cup by means of a rubber cap or band.

With `a mouthpiece soconstructed there is a direct suction on the exterior of the teat which draws same outwardly against the-inner eriphery of the mouthpiece, thus secure ylholdin the cu and preventing the contraction o the mil assage in the teat.

The invention is clear y illustrated by the accompanying drawin s, whereof- Figure I is a plan o the mouthpiece; Fig. 2, a central transversev section fon line 11 11, Fig. 1; Fig. 3, an elevation of a teat-cup, partly in section, with the mouthpiece attached thereto; Figs. 4 and 5 are similar views' to Fig. 2, showing examples of the various shapes the hollow chamber may take. *Refe'rrin to the drawings, 1 represents the annular ho ow or chambered portion of the metallic mouthpiece, which is raised above the flange 2 thereof andis in direct communication Lwith the suction in the cup 3 either by means'of the holes 4, as illustrated in Figs. 4 and 5, or by a continuous opening 5, as illustrated ign Figs. 2 and 3. The object of said 5o raised hollowr or chambcred portion 1 is to insre'a free passage to the suction-pressure and also to enable' the usual pulsating tongue,

bag, gum, or inner ilexible chamber 6 to o erate as near the root of the teat as possiblpe. The inner periphery of the hollow chambered portion of the cup is formed with a nurmber'of holes 7, as illustrated in Figs. 1, 2, 3, and 4, or similarly, again, by a continuous slot 8, as illustrated in Fig. 5. The object of these openings is to place theteat in communication with the suction in the cup, and so draw the skin of said teat against the inner periphery of the mouthpiece, and thereby hold the teat-cup securely on the teat, and at the same time overcome'the tendency of teatcups to close the milk-passage of the teat, as is usual where a compression-mouthpiece is employed for gripping same.

The'liollow or chambered portion of the mouthpiece may of course vary in shape or section so long as the'object for which it is designed is achieved.

The flange 2 is preferably its outer periphery, as shown, lit substantially aroundthe teelt-cup,

turned down on and adapted to and the mouthpiece is secured thereto-by a rubber.

band 9, Fig. 3, engaging said flange.

In the drawings, 10 represents an air-inlet,

` as described in myV previous patent, numbered 744,188, for the purpose of admitting atmospheric ressure behind .the milk in order to assist the low of same to the milk-receiver.

The mode of operation is as follows: The teat-cup is slipped over,the'teat and the suction applied, so .that the air-pressure in the hollow chamber'of the mouthpiece is reduced which causes the teat to adhere thereto. The pulsations are then admitted to the cup, which cause the teat to be first squeezed and then released. During the former action the hollow chamber is temporarily almost cut off from direct communication with the suction in the cup, but it still retains sufficient suction power, together with the grip of the inner linin to hold said cup' on the teat, and when the exible lining of the cup is exhausted or deiated the air admitted through the air-inlet rushes4 down and drives the milkv from the cup toward the receiver, as previously mentioned. K

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is-.-

1. An improved mouthpiece for pneumatic teat-cups made of a substantially rigid substance suchas metal and having' a hollow chamberthe under side of which is in communication with thel suction in the cup, and

set fort IOO IIO

1 5 f ber her/ing openings on its under side .and 11iteruel perlphery and en air-'inlet in its exter- 2. An improved mouthpiecefor pneumatic teat-cups mede of e'substentially rigid substance Such es' metal having,r e iiengel to nt substantially round the top of the teat-cup,

and a'reised hollowr chamber which substem'l tielly encircles the root of the teet, seid clieml ber having openings on its underside and internal periphery substantially es and for the purpose set forth.

3. An improved mouthpiece for pneumatic teint-cups mede of e substantially rigid sub stance euch es metal having e. ienge to fit' 'substantially round the top of the teet-eup,

and e reised hollow chamber which substantially encirolee the root of lthe teet, seid ehemnelJ circumference substantially es and for the purpose set forth.`

4. In a metallic mouthpiece for pneumatic tent-cups e raised ennuler hollow chainbered portion with openings in the under side end around the internal periphery thereof substentially Ves und for the purpose'set forth.

5. In e metallic mouthpiece for pneumatic teetlcups e raised annuler hollow chembered ortion completely open on its under side end ailing e series of holes on its internal periph- 'ery substantially es end for the purpose set flrlh... I i

n testimony whereof have hereunto set 'my hand in presence of two subscribing witnesses.

ALEXANDER erLLrEs.

Witnesses:

EDWARD N. .WATERS, 4'VrLLiAM H. WATERS. 

